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US Patent: 444,778
Bench Clamp For Pipe Tongs and Wrenches
Clarence V. Greenamyer - San Francisco, CA

USPTO Classifications:
269/243, 269/89, 269/96, 81/180.1

Tool Categories:
work holding : vises : pipe and chain vises

Verner Wrench Car Mover and Power Manufacturing Company - San Francisco, CA

Not known to have been produced

Wm. Mayer
A. M. Charlot
Edward E. Osborn
Otis H. Sawyer

Patent Dates:
Applied: Sep. 09, 1890
Granted: Jan. 13, 1891

Patent Pictures:
Clarence V. Greenamyer patent January 13, 1891
USPTO pdf tiff
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The clamp consists of a channel iron base, along with a loop having a threaded extension and a tightening hand-nut. This tool would be fastened to a work bench or similar stable surface.

One of the wrenches shown in the illustrations is the design in Greenamyer's parallel patent (no. 444,779).

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